Detail publikace

Asymetrie rychlosti Dzyaloshinskeho doménových stěn v režimu tečení a kreepu.

VAŇATKA, M. ROJAS-SÁNCHEZ, J. VOGEL, J. BONFIM, M. BELMEGUENAI, M. ROUSSIGNÉ, Y. STACHKEVITCH, A. THIAVILLE, A. PIZZINI, S.

Český název

Asymetrie rychlosti Dzyaloshinskeho doménových stěn v režimu tečení a kreepu.

Anglický název

Velocity asymmetry of Dzyaloshinskii domain walls in the creep and flow regimes

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

en

Originální abstrakt

We have carried out measurements of domain wall dynamics in a Pt/Co/GdOx(t) wedge sample with perpendicular magnetic anisotropy. When driven by an easy-axis field Hz in the presence of an in-plane field Hx, the domain wall propagation is different along ±x, as expected for samples presenting Dzyaloshinskii–Moriya (DMI) interaction. In the creep regime, the sign and the value of the domain wall velocity asymmetry changes along the wedge. We show that in our samples the domain wall speed versus Hx curves in the creep regime cannot be explained simply in terms of the variation of the domain wall energy with Hx, as suggested by previous works. For this reason the strength and the sign of the DMI cannot be extracted from these measurements. To obtain reliable information on the DMI strength using magnetic field-induced domain wall dynamics, measurements have been performed with high fields, bringing the DW close to the flow regime of propagation. In this case we find large values of the DMI, consistent in magnitude and sign with those obtained from Brillouin light scattering measurements.

Český abstrakt

Publikace se věnuje asymetrieï rychlosti Dzyaloshinskeho doménových stěn v režimech tečení a kreepu.

Anglický abstrakt

We have carried out measurements of domain wall dynamics in a Pt/Co/GdOx(t) wedge sample with perpendicular magnetic anisotropy. When driven by an easy-axis field Hz in the presence of an in-plane field Hx, the domain wall propagation is different along ±x, as expected for samples presenting Dzyaloshinskii–Moriya (DMI) interaction. In the creep regime, the sign and the value of the domain wall velocity asymmetry changes along the wedge. We show that in our samples the domain wall speed versus Hx curves in the creep regime cannot be explained simply in terms of the variation of the domain wall energy with Hx, as suggested by previous works. For this reason the strength and the sign of the DMI cannot be extracted from these measurements. To obtain reliable information on the DMI strength using magnetic field-induced domain wall dynamics, measurements have been performed with high fields, bringing the DW close to the flow regime of propagation. In this case we find large values of the DMI, consistent in magnitude and sign with those obtained from Brillouin light scattering measurements.

Klíčová slova česky

Doménové stěny; Dynamika doménových stěn; Interakce Dzyaloshinskieho–Moriyi; Spin–orbitální moment; Magnetické nanostruktury

Klíčová slova anglicky

Domain walls; Domain wall dynamics; Dzyaloshinskii–Moriya interaction; Spin–orbit torques; Magnetic nanostructures

Rok RIV

2015

Vydáno

27.07.2015

ISSN

0953-8984

Ročník

27

Číslo

32

Strany od–do

326002-1–326002-8

Počet stran

8

BIBTEX


@article{BUT116855,
  author="Marek {Vaňatka} and Jan {Čechal} and Juan-Carlos {Rojas-Sánchez} and Jan {Vogel} and Marlio {Bonfim} and Mohamed {Belmeguenai} and Yves {Roussigné} and Andrei {Stachkevitch} and André {Thiaville} and Stefania {Pizzini},
  title="Velocity asymmetry of Dzyaloshinskii domain walls in the creep and flow regimes",
  year="2015",
  volume="27",
  number="32",
  month="July",
  pages="326002-1--326002-8",
  issn="0953-8984"
}